671947 has 2 divisors, whose sum is σ = 671948. Its totient is φ = 671946.

The previous prime is 671941. The next prime is 671969. The reversal of 671947 is 749176.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 671947 - 2³ = 671939 is a prime.

671947 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 671947.

It is not a weakly prime, because it can be changed into another prime (671941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335973 + 335974.

It is an arithmetic number, because the mean of its divisors is an integer number (335974).

2⁶⁷¹⁹⁴⁷ is an apocalyptic number.

671947 is a deficient number, since it is larger than the sum of its proper divisors (1).

671947 is an equidigital number, since it uses as much as digits as its factorization.

671947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 34.

The square root of 671947 is about 819.7237339494. The cubic root of 671947 is about 87.5880800139.

The spelling of 671947 in words is "six hundred seventy-one thousand, nine hundred forty-seven".